在寒武纪生命大爆发期间，主要模式转化只用了数千万年的时间。
During the Cambrian explosion, major paradigm shifts took only tens of millions of years.
10亿到5亿四千万年之间，就是在化石中发现许多生命之后的寒武纪大爆发时期。
This period, from 1 billion to 540 million years ago, is known as the "Cambrian explosion" after the riot of diverse life found in the fossil record.
化学化石(烷烃和卟啉)是前寒武纪地层中生命存在的唯一证据。
Chemical fossils (e. g. alkanes and porphyrins) are often the only evidence for life in rocks of PRECAMBRIAN age.
这些复杂生命突然出现，暗示了寒武纪爆发式演化事件的存在。
The sudden emergence of those complicated life forms hinted the existence of evolution events of Cambrian explosion.
“雪球地球”的极端气候环境变化，促进了生命的演化，造成了寒武纪生物大爆发。
The extreme climate arisen from "snowball Earth" may promote evolution of life and trigger the "Cambrian Explosion".
接着，令人难以置信的事情发生了：在科学家称为寒武纪爆炸的一个相对短暂的时期内，生命极大地扩展成多细胞形式。
And then something incredible starts to happen: a tremendous expansion of life into multi-celled forms during a relatively brief period that scientists call the Cambrian Explosion.
原生代的，元古代的前寒武纪两个时期中的后一个时期的，属于这个时期的，在这个时期的在这个时期海绵、海洋蠕虫和其它形式的海洋生命出现。
Of, belonging to, or being the later of two divisions of Precambrian time, during which sponges, sea worms, and other forms of sea life appeared.
原生代的，元古代的前寒武纪两个时期中的后一个时期的，属于这个时期的，在这个时期的在这个时期海绵、海洋蠕虫和其它形式的海洋生命出现。
Of, belonging to, or being the later of two divisions of Precambrian time, during which sponges, sea worms, and other forms of sea life appeared.
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